Amazing Best Chicken Fajita Casserole

October 30, 2025 by Amelia Johnson

A colorful casserole dish filled with tender chicken, sliced bell peppers, onions, and melted cheese, showcasing the vibrant flavors of chicken fajitas baked in a comforting, cheesy bake.

The Best Chicken Fajita Casserole Recipe

Introduction

I’ve always adored fajitas, but as a busy chef, I found that there were nights when I just wanted the delicious flavors without all the fuss. That’s when I developed this Best Chicken Fajita Casserole! It’s packed with all the vibrant flavors of traditional fajitas but comes together in a simple, one-dish meal that’s ready in about 50 minutes. If you’re looking for an easy and flavorful weeknight recipe, keep reading!

Why This is the Best Chicken Fajita Casserole

  • Easy Cleanup: With everything baked in one casserole dish, you won’t have a pile of dishes waiting for you after dinner.
  • Quick Assembly: You can whip this up in a matter of minutes. It’s perfect for those nights when you don’t want to spend too long in the kitchen.
  • Customizable Spice Level: Adjust the seasoning to your family’s taste, making it as mild or spicy as you like!
  • Family-Friendly Flavor: This casserole features familiar tastes that will please even the pickiest eaters at your table.

Why Make Fajitas into a Casserole?

Transforming fajitas into a casserole has countless benefits. Not only does it create less mess, but it also makes serving a crowd much simpler. Everything cooks together, marrying the flavors beautifully while letting you enjoy more hands-off cooking. Plus, the ease of portioning makes it perfect for family dinners or casual gatherings.

Ingredients for the Best Chicken Fajita Casserole

  • 4 cups shredded cooked chicken (about 2 large breasts)
  • 2 cups instant rice
  • 1 (10.5-ounce) can cream of chicken soup
  • 1 cup sour cream
  • 1 cup frozen diced onion and bell pepper blend
  • 1 (10-ounce) can diced tomatoes with chilies (undrained; like Rotel)
  • 1 1/2 cups chicken broth
  • 1 (1.12-ounce) packet fajita seasoning (I prefer McCormick)
  • 1 (8-ounce) package shredded Mexican blend cheese (about 2 cups)

Each ingredient in this casserole plays a critical role. The shredded chicken provides protein, the instant rice ensures this dish is quick and easy, and the cream of chicken soup, along with the sour cream, creates a rich and creamy texture. If you enjoy creamy chicken dishes, this casserole will be a hit. The blend of onions and bell peppers brings that classic fajita flavor, while the diced tomatoes with chilies add a spicy kick. The fajita seasoning is what ties it all together, and the shredded cheese on top gives you that gooey, delicious finish!

Homemade Fajita Seasoning

If you’re feeling adventurous, try making your own fajita seasoning! A simple blend of chili powder, cumin, garlic powder, onion powder, paprika, and salt can give you more control over the flavor. For detailed instructions, check out my post on homemade spice blends here. But don’t worry, using pre-made seasoning works just fine, too!

Step-by-Step Instructions

  1. Preheat the oven to 350°F. Lightly spray a 9×13 inch baking dish with nonstick cooking spray.
  2. In a large bowl, stir together the chicken, uncooked rice, cream of chicken, sour cream, diced onion and bell pepper, tomatoes with chilies, chicken broth, fajita seasoning, and about half of the cheese.
  3. Pour the mixture into the prepared dish and spread it evenly. Wrap tightly in aluminum foil. Bake for 35 to 45 minutes or until the rice is tender.
  4. Remove from the oven, top with the remaining cheese, and return to the oven until the cheese is melted.

Tips: Make sure the rice is distributed evenly in the casserole to ensure it cooks properly. I recommend checking for doneness around 35 minutes; if the rice isn’t tender yet, give it a few more minutes.

Chicken Preparation Options

When it comes to chicken, there are several options:

  • Rotisserie Chicken: Easily shred store-bought rotisserie chicken for a quick, flavorful base. For another easy chicken recipe, consider making pulled chicken in a crockpot.
  • Cooking Chicken Breasts: For a healthier option, poach or grill chicken breasts until cooked through, then shred.
  • Using Thighs: If you prefer, you can use chicken thighs which can add extra moisture.
  • Cooking in Casserole: If you want to use raw chicken, simply dice it and add to the casserole, ensuring it reaches an internal temperature of 165°F.

Recipe Variations and Additions

VariationDescription
Add Black BeansStir in a can of drained black beans for extra fiber.
Different CheesesSwap the Mexican blend for Monterey Jack or cheddar.
Spice it UpInclude fresh jalapeños or cayenne pepper for extra heat.
Extra VeggiesAdd mushrooms or zucchini for more texture and nutrition.

Dietary Adjustments

To cater to different dietary needs:

  • Gluten-Free: Ensure the cream of chicken soup is labeled gluten-free and use gluten-free ingredients throughout.
  • Dairy-Free: Swap the sour cream for dairy-free alternatives, and use cashew cream for creaminess.

How to Build a Complete Chicken Fajita Casserole Meal

Enhance your meal with:

  • Appetizers: Serve with chips and salsa or guacamole for a delicious start.
  • Side Dishes: Pair with Mexican rice or refried beans to complete your feast. If you’re looking for hearty creamy chicken dishes, there are many delicious options.
  • Drink Pairings: Margaritas or iced tea are great companions for this dish.
  • Desserts: Finish off with churros or a light fruit salad for a refreshing touch.

Make-Ahead and Storage Tips

You can prepare this casserole ahead of time! Assemble it in the dish, cover it with foil, and refrigerate it for up to 24 hours before baking. For freezing, wrap it tightly in plastic wrap and aluminum foil, or place it in an airtight container. It can be frozen for up to 3 months without compromising quality.

Freezing Instructions

To freeze, ensure the casserole is completely cool. Use freezer-safe dishes or airtight containers. For thawing, place it in the refrigerator overnight before cooking.

Reheating Instructions

  • From Refrigerated: Reheat in the oven at 350°F covered with foil until heated through.
  • From Frozen: Thaw overnight then reheat in the oven, or microwave individual portions for a quick meal.

Troubleshooting Guide

  • Rice Under-cooked: If the rice isn’t tender, add more broth and cover tightly with foil, then return to the oven.
  • Casserole Too Dry: Add a splash of broth or salsa before reheating to restore moisture.
  • Lacking Flavor: A sprinkle of more fajita seasoning or a drizzle of hot sauce can amp up the flavor.

Equipment Recommendations

For this recipe, you’ll need:

  • A 9×13 inch baking dish
  • Mixing bowls for combining ingredients
  • An oven thermometer to ensure accurate baking temperatures

Frequently Asked Questions

  • What kind of rice can I use? Instant rice is recommended for a quick cooking time, but brown rice can be used if adjusted for longer cooking.
  • Can I use different vegetables? Absolutely! Feel free to add any vegetables your family enjoys.
  • How spicy is this casserole? The spice level depends on the fajita seasoning; you can always adjust it to your liking.
  • Can I use pre-cooked rice? Yes, just reduce the amount of broth as pre-cooked rice won’t need as much liquid.

Conclusion

This Best Chicken Fajita Casserole is not only easy to make but also bursting with flavor that will make your weeknight dinners a breeze. I hope you give this recipe a try! If you have any questions or try this recipe, please leave a comment below. I can’t wait to hear what you think!

Amazing Best Chicken Fajita Casserole

Carlos Hernández
This Best Chicken Fajita Casserole is packed with all the vibrant flavors of traditional fajitas but comes together in a simple, one-dish meal. It’s ready in about 50 minutes, making it an easy and flavorful weeknight recipe.
Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Course Main Course
Cuisine American, Mexican
Servings 8 servings
Calories 405 kcal

Equipment

  • 9×13 inch baking dish
  • Mixing bowls
  • Oven thermometer

Ingredients
  

  • 4 cups shredded cooked chicken about 2 large breasts
  • 2 cups instant rice
  • 1 (10.5-ounce) can cream of chicken soup
  • 1 cup sour cream
  • 1 cup frozen diced onion and bell pepper blend
  • 1 (10-ounce) can diced tomatoes with chilies undrained; like Rotel
  • 1 1/2 cups chicken broth
  • 1 (1.12-ounce) packet fajita seasoning I prefer McCormick
  • 1 (8-ounce) package shredded Mexican blend cheese about 2 cups

Instructions
 

  • Preheat the oven to 350°F. Lightly spray a 9×13 inch baking dish with nonstick cooking spray.
  • In a large bowl, stir together the chicken, uncooked rice, cream of chicken, sour cream, diced onion and bell pepper, tomatoes with chilies, chicken broth, fajita seasoning, and about half of the cheese.
  • Pour the mixture into the prepared dish and spread it evenly. Wrap tightly in aluminum foil. Bake for 35 to 45 minutes or until the rice is tender.
  • Remove from the oven, top with the remaining cheese, and return to the oven until the cheese is melted.

Notes

Make sure the rice is distributed evenly in the casserole to ensure it cooks properly. I recommend checking for doneness around 35 minutes; if the rice isn’t tender yet, give it a few more minutes. To prepare ahead, assemble the casserole, cover with foil, and refrigerate for up to 24 hours. For longer storage, freeze for up to 3 months. Thaw overnight in the refrigerator before reheating. Reheat from refrigerated in the oven at 350°F covered with foil until heated through. If rice is under-cooked, add more broth and cover tightly, then return to the oven. If the casserole is too dry, add a splash of broth or salsa before reheating. For more flavor, sprinkle more fajita seasoning or drizzle hot sauce.
Keyword casserole, cheesy, chicken fajita casserole, fajita, fajita chicken casserole, mexican chicken casserole

Printable Recipe Card

Want just the essential recipe details without scrolling through the article? Get our printable recipe card with just the ingredients and instructions.

Readers Love These Recipes

Leave a Comment

Recipe Rating